modules/javafx.controls/src/main/java/javafx/scene/control/skin/SpinnerSkin.java

@@ -264,14 +264,14 @@
     /** {@inheritDoc} */
     @Override protected void layoutChildren(final double x, final double y,
                                             final double w, final double h) {
 
         final double incrementArrowButtonWidth = incrementArrowButton.snappedLeftInset() +
-                snapSize(incrementArrow.prefWidth(-1)) + incrementArrowButton.snappedRightInset();
+                snapSizeX(incrementArrow.prefWidth(-1)) + incrementArrowButton.snappedRightInset();
 
         final double decrementArrowButtonWidth = decrementArrowButton.snappedLeftInset() +
-                snapSize(decrementArrow.prefWidth(-1)) + decrementArrowButton.snappedRightInset();
+                snapSizeX(decrementArrow.prefWidth(-1)) + decrementArrowButton.snappedRightInset();
 
         final double widestArrowButton = Math.max(incrementArrowButtonWidth, decrementArrowButtonWidth);
 
         // we need to decide on our layout approach, and this depends on
         // the presence of style classes in the Spinner styleClass list.

@@ -307,14 +307,14 @@
             incrementArrowButton.resize(incrementArrowButtonWidth, h);
             positionInArea(incrementArrowButton, buttonStartX + decrementArrowButtonWidth, y,
                     incrementArrowButtonWidth, h, 0, HPos.CENTER, VPos.CENTER);
         } else if (layoutMode == SPLIT_ARROWS_VERTICAL) {
             final double incrementArrowButtonHeight = incrementArrowButton.snappedTopInset() +
-                    snapSize(incrementArrow.prefHeight(-1)) + incrementArrowButton.snappedBottomInset();
+                    snapSizeY(incrementArrow.prefHeight(-1)) + incrementArrowButton.snappedBottomInset();
 
             final double decrementArrowButtonHeight = decrementArrowButton.snappedTopInset() +
-                    snapSize(decrementArrow.prefHeight(-1)) + decrementArrowButton.snappedBottomInset();
+                    snapSizeY(decrementArrow.prefHeight(-1)) + decrementArrowButton.snappedBottomInset();
 
             final double tallestArrowButton = Math.max(incrementArrowButtonHeight, decrementArrowButtonHeight);
 
             // increment is at the top
             incrementArrowButton.resize(w, tallestArrowButton);